ID 271069 - DAG slows down when multiple transform nodes have motion blur on and expressions applied

Problem summary
DAG slows down when multiple transform nodes have motion blur on and expressions applied

Customer reported version
nuke.n/a

Customer reported platform

Steps to reproduce

1) Open the attach Nuke Script

2) In a clear area of the DAG, create some Dot nodes, they will take a while to be created

3) Run the below script to set the motionblur on the Transform nodes to 0:

for node in nuke.allNodes("Transform"):
    node["motionblur"].setValue(0)

4) Create more Dot nodes, they will create much more quickly.

Workaround
Remove the expressions or set the motion blur to 0 on the Transform Nodes, or only view the first couple of Merge nodes.

Reproduced by support
This problem has been reproduced on:
Nuke 10.5v3 - Windows 10 - CentOS 6.8 - MacOSX 10.12
Nuke 10.5v1 - Windows 10
Nuke 10.0v6 - Windows 10
Nuke 10.0v1 - Windows 10
Nuke 9.0v9 - Windows 10
Nuke 9.0v1 - Windows 10
Nuke 8.0v7 - Windows 10 - CentOS 6.8 - MacOSX 10.12

Expected behaviour
For the DAG to be interactive

Actual behaviour
The DAG slows down when creating or editing nodes